JQuery Calculator

Your pen code currently just displays strings representing the pushed buttons, but to perform the actual calculations, you'll need to convert the strings into numbers and then apply the correct operators.

Here's a few hints and suggestions:

• use a different class for operators
• as values are entered, create a numeric value (register)
• when an operator is entered, store the operation to perform later and save the numeric value
• when the equal is entered, perform the operation on the two numeric values
• the convention of $ in variable names is for jQuery objects, not values

An example of building up the numeric value in the button handler:

register = register * 10 + parseInt(valueHTML);  // variable was "$valueHTML"

And when handling an operator:

operator = valueHTML;
operand = register;
register = 0;

And when handling equals:

switch(operator) {
  case "+": total = operand + register; break;
  case "-": total = operand - register; break;
  // ...etc.
}